When Astrid, a professional therapist who is struggling to find meaningful friendships, starts having an affair with her patient Céline’s husband, it puts a strain on an already difficult relationship with her son, David. Meanwhile, Céline, a retired prostitute content with living a domesticated life, befriends David when he tries run away from home by booking a flight through her travel agency. However, when David discloses the affair to Céline, she must decide how to deal with the betrayal and lies.